Johann martignoni



(No Model.)

J. MARTIGNONI. I CUTTER AND. CUTTER HOLDER.

1w 496,256. PatentedApr. 11', 1893.

WITNESSES: INVENTOH @A /%CWE/ 441ml v By yw ATTOHNE Yb",

UNITED STATES PATENT OFFICE.

JOHANN MARTIGNONI, OF FRANKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR TO CARLBERLE, OF SAME PLACE.

CUTTER AND CUTTER-HOLDER.

SPECIFICATION forming part of Letters Patent No. 495,256, dated April11, 1893.

Application filed October 29, 1890. Serial No. 369,673. (No model.)Patented in Germany December 9 1888, No. 48,470 in Belgium December 11,1888, No. 84,301; in France January 29, 1889, No. 191,017 inAustria-Hungary August 1 1889, No. 13,374: in Switzerland October 19,1889. N0. 44:; in England December 14:, 1889, No. 20,152, and in ItalyMay T to whom it may concern:

Be it known that I, J OHANN MARTIGNONI, a subject of the King ofPrussia, residing at the city of Frankfort-on-the-Main, in the Kingdomof Prussia, Germany, have invented certain new and useful Improvementsin Cutters and Cutter-Holders, (for which Letters Patent were granted inGermany, with my consent, to Carl Berle, No. 48,470, dated December 9,

to 1888; in Austria-Hungary, No. 13,374, dated August 27, 1889; inFrance, amendment to Patent No. 191,017, dated January 29, 1889; inBelgium, amendment to Patent No. 84,301, dated December 11, 1888; inItaly No. 27,278,

15 dated May 3, 1890; in England, No. 20,152, dated December 14, 1889,and in Switzerland, amendment to Patent No. 44, datedOctober 19, 1889;)and I do hereby declare that the following is a full, clear,-and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same.

The object of my invention is to provide a new and improved tool forcutting, boring,

milling, &c.

The invention consists in a cutting disk provided with a hub, which diskis divided into a series of sector-shaped sections having difiereutinclinations to the longitudinal axis 0 of the hub, said sector-shapedsections each having acutting edge formed at the end of the rim parts.

In the accompanying drawings, Figure 1 is a perspective front view of myimproved cut- 5 ting, milling and boring tool. Fig. 2 isaside view ofthe same. Fig. 3 is a sectional view of the same, showing it providedwith a hollow hub held in the holder.

Similar letters of reference indicate corresponding parts.

The implement consists of a disk 9 having a central hub h, which disk isdivided into a series of approximately sector-shaped sections 17, at oneend of the outer rim of each of which a cutting edge e is formed. Saidsector-shaped sections are all arranged at slightly differentinclinations to the longitudinal axis of the hub it, so as to have theface of the disk the appearance of a propeller screw and to adapt thedevice to make a number of different cuts. The instrument can easily beadjusted in its holder without requiring the removal of the same fromthe holder, to make any of the desired cuts. As shown in Figs.

1 and 2, it is provided with a solid stem h. As the different work is tobe done the different cutting edges are used; for example, one cuttingedge would be used in cutting through thread, another for planing,another for fine planing, another for milling, &c. All that is necessarywith this instrument for performing these different operations is merelyto turn the cutter until the edge is in the proper position for cuttingand then to fasten the cutting disk in this position. A completeinterchange of the cutting-teeth as was necessary heretofore is notnecessary and thus much time and labor are saved. As shown in Fig. 3,the disk 9 is adapted to be held on the end of a sleeve or tubularholder (1 provided with a tapering recess ifor receiving the tapering orconical hub h of said disk.

A screw-bolt e is provided at one end with a tapering headf fitting inthe bore of the hub h, and on the opposite end of said bolt the nut k isscrewed. By drawing up said nut the tapering headfdraws the hub it intothe recess 1', whereby it is held securely on the holder or sleeve d.The holder can be fastened in a slide rest of a lathe or boring ma- 8ochine, the cutting disk acting by means of its cutting edges or teeththe same as an ordinary boring tool.

Having thus described my invention, I claim as new and desire to secureby Letters Patent A cutting disk provided on its face with one or moresector-shaped sections, each having an inclination to the axis of thedisk, the inclinations being different from each other, 0 thus givingthe face of the disk a curvature approximately to that of a propellerscrew, and a cutting edge being formed on the rim of the disk for eachsection, substantially as set forth. 4

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

J Ol-IANN MARTIGNONI.

Witnesses:

FRIEDRICH VON ROESSLER, HEINRICH Wtisr.

